Zac Poonen emphasizes the necessity of disciplining our eyes and tongues as essential parts of our bodies that must be presented to God. He references Paul's commitment to training his body to do what it should, warning that failure to control these members can lead to disqualification in God's eyes. Poonen highlights the importance of purity in our gaze and speech, noting that many have fallen due to a lack of vigilance in these areas. He encourages believers to strive for a life that pleases God, following the example of Jesus, who kept His body pure for the Father. Ultimately, a wholehearted disciple must mourn over any impurity and seek to present themselves without blemish to God.